Re: [ihc] Re: Humphrey's Coil Voltage

[George B Humphrey <xgbhx@xxxxxxxx>]

	So was the resistance wire a substitute for the ballast resistor? A
different way of doing the same thing?

> 
> The earlier scouts had a resistance wire with a value of "about" 1.8 
> ohms.
> The internal resistance of the coil is about 1.5 ohms, at least 
> every one
> I've measured from a stock pickup, travelall, or scout circa 1970. 
> This
> gives an approximate run voltage of 6 volts. Naturally, the start 
> curcuit
> doubles that voltage, which also doubles the current.
> 
> The resistance wire's function is to protect the points, because the 
> extra
> current derived from running 12 volts burns them up pretty quickly. 
> Since 6
> volts was adequate before the change to 12 volt systems, the auto 
> industry
> stayed with 6 volt coils in most vehicles. This was less expensive 
> than
> making 12 volt coils.
> 
> 12 volts does not hurt a 6 volt coil, however. It just makes a 
> bigger spark.
> For this reason, you can use a pertronix or even a high powered 
> ignition,
> such as an MSD, with a stock coil.
> 
> -Allan
> 
> 
> 


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